事件监听器可以监听到，缓存元素创建、移除、更新、过期等。

EHCache版本： ehcache-2.9.0

实例代码：

maxEntriesLocalHeap="10000"

eternal="false"

timeToIdleSeconds="60"

timeToLiveSeconds="60"

maxEntriesLocalDisk="10000000"

diskExpiryThreadIntervalSeconds="30"

memoryStoreEvictionPolicy="LRU">

class="com.what21.ehcache.event.MyCacheEventListenerFactory"

properties="cache=mycache" />

package com.what21.ehcache.event;

import java.util.Properties;

import net.sf.ehcache.event.CacheEventListener;

import net.sf.ehcache.event.CacheEventListenerFactory;

public class MyCacheEventListenerFactory extends CacheEventListenerFactory {

@Override

public CacheEventListener createCacheEventListener(Properties props) {

return new MyCacheEventListener(props);

}

}

package com.what21.ehcache.event;

import java.util.Properties;

import net.sf.ehcache.CacheException;

import net.sf.ehcache.Ehcache;

import net.sf.ehcache.Element;

import net.sf.ehcache.event.CacheEventListener;

public class MyCacheEventListener implements CacheEventListener {

public MyCacheEventListener(Properties props){

System.out.println("props = " + props);

}

@Override

public void notifyElementEvicted(Ehcache ehcache, Element element) {

System.out.println("notifyElementEvicted()..");

System.out.println(ehcache);

System.out.println(element);

}

/**

* 元素过期触发

*/

@Override

public void notifyElementExpired(Ehcache ehcache, Element element) {

System.out.println("notifyElementExpired()..");

System.out.println(ehcache);

System.out.println(element);

}

@Override

public void notifyElementPut(Ehcache ehcache, Element element)

throws CacheException {

System.out.println("notifyElementPut()..");

System.out.println(ehcache);

System.out.println(element);

}

@Override

public void notifyElementRemoved(Ehcache ehcache, Element element)

throws CacheException {

System.out.println("notifyElementRemoved()..");

System.out.println(ehcache);

System.out.println(element);

}

@Override

public void notifyElementUpdated(Ehcache ehcache, Element element)

throws CacheException {

System.out.println("notifyElementUpdated()..");

System.out.println(ehcache);

System.out.println(element);

}

@Override

public void notifyRemoveAll(Ehcache ehcache) {

System.out.println("notifyRemoveAll()..");

System.out.println(ehcache);

}

@Override

public void dispose() {

System.out.println("dispose()..");

}

@Override

public Object clone() throws CloneNotSupportedException {

throw new CloneNotSupportedException("non supported");

}

}

package com.what21.ehcache.event;

import net.sf.ehcache.Cache;

import net.sf.ehcache.CacheManager;

import net.sf.ehcache.Element;

public class EventEhcache {

/**

* @param args

*/

public static void main(String[] args) {

//

String path = EventEhcache.class.getResource("ehcache.xml").getPath().toString();

System.out.println("path = " + path);

// 创建 CacheManager

CacheManager manager = CacheManager.create(path);

// 获取默认的

Cache what21Cache = manager.getCache("what21Cache");

System.out.println("what21Cache = " + what21Cache);

// 缓存内容

Element element = new Element("aaa", "aaa");

what21Cache.put(element);

try {

Thread.sleep( 2*60 * 1000);

} catch (InterruptedException e) {

e.printStackTrace();

}

// 访问缓存

Element cacheEle = what21Cache.get("aaa");

if(cacheEle!=null){

System.out.println("Key： " + cacheEle.getObjectKey());

System.out.println("Value： " + cacheEle.getObjectValue());

}else{

System.out.println("已过期，Key： aaa");

}

}

}